diff --git a/degesch.c b/degesch.c
index 2295006..6eb2b47 100644
--- a/degesch.c
+++ b/degesch.c
@@ -3116,7 +3116,7 @@ formatter_parse_mirc (struct formatter *self, const char *s)
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
 static void
-formatter_parse_nick (struct formatter *self, char *s)
+formatter_parse_nick (struct formatter *self, const char *s)
 {
 	// For outgoing messages; maybe we should add a special #t for them
 	// which would also make us not cut off the userhost part, ever
@@ -3156,7 +3156,7 @@ formatter_parse_nick (struct formatter *self, char *s)
 }
 
 static void
-formatter_parse_nick_full (struct formatter *self, char *s)
+formatter_parse_nick_full (struct formatter *self, const char *s)
 {
 	formatter_parse_nick (self, s);
 
diff --git a/liberty b/liberty
index 2a15b1d..f53b717 160000
--- a/liberty
+++ b/liberty
@@ -1 +1 @@
-Subproject commit 2a15b1de700eb4e20c6bebb9742c8e20fffc9687
+Subproject commit f53b717f3bba27ca1c42486d3742c91967f3fe93